abstract class Bibliotheque
{
	protected int count = 0;
	
	public int getCount()
	{
		return count;
	}

	public void removeBook(Ouvrage ov)
	{
		remove(ov.getCote());
	}

	public String toString()
	{
		String res = "";
		for (int i=0; i<count; i++)
			res += get(i) + "\n";
		return res;
	}

	public abstract void add(Ouvrage ov);
	public abstract void remove(int cote);
	public abstract Ouvrage get(int cote);
}
